Action Rank

Radius

Defines the area with which the action operates.

Rank

This value gives the rank by percentage. For each pixel in the input image, the rank action sorts all pixels within a radius by pixel value, and copies the rank'th value to the output image. To give a better understanding, these are example values:

• 0% delivers the same result as the Minimum action
• 50% delivers the same result as the Median action
• 100% delivers the same result as the Maximum action

Amount

Read here.